20. 
19. 
RECONNAISSANCE IN COLORADO AND UTAH 
SECTION ON SOUTH SIDE OF WEST CREEK (L. H. WOOLSEY) 
Top. Triassic red beds. 
Conglomeratic grit, fine-grained, pinkish : 
Interval, mainly covered by talus, but with eee grit reread hee 
and there 
Interbedded arkose nil gnats padine Trend into vehate 
Conglomerate, containing pebbles 4-5 inches in diameter, of various 
granites, in matrix of red arkose sand 
Covered interval 
. Friable grits not well exposed ona Probab very thal to No. 14 
Conglomerate and fine arkose, interbedded, the pebbles generally of 
coarse granite and gneiss, up to 12 inches in diameter 
Covered by talus 
. Arkose, red, fine-grained, ith pceicipnal pebbles a Branitel or green- 
stone, 3 inches diameter 
Concealed by talus : 
Conglomerate of gneiss and coarse Gems bolder up to 12 hes 
diameter; arkose matrix : 
Concealed by débris, but apparently ike ; : : 
Conglomerate arkose, alternating fine and coarse; che, fuer: eated 
parts are similar to No. 7; the conglomerate carrying bowlders 
of various granites up to 6 inches diameter i 
Arkose, reddish, mostly fine-grained with pebbles 1 inch or tees) in 
diameter; occasional bowlders of different granites to 9 inches; 
toward top becomes interbedded with thin red shale layers, but 
lenses of bowlders are also present in this upper part : 
Conglomerate, coarse, the granite and gneiss bowlders reaching 14 feet 
in diameter, the largest ones near top, rests unconformably on 5 
Arkose grit and red shale alternating; 4 feet of fine-grained arkose at 
base, with thin seams of shale; these become more and more 
prominent toward top; coarse lenses of conglomerate at several 
horizons; isolated bowlders occur in certain shale layers . 
Arkose grit, reddish, grading into coarse conglomerate at top, con- 
taining some bowlders 13 feet in diameter : 
Shale, red and green, irregular in thickness, owing to erosion 
Arkose grit, dark reddish, conglomeratic and seldom cross-bedded, the 
coarser parts in lenticular bodies; granite pebbles reach 6 inches 
diameter; a few pebbles of greenstone, the great oe being 
granite or gneiss : 
Grit-conglomerate, gray, pink, or eters in massive cross- Shedded 
banks, with numerous layers of fine grain, and usually darker 
color 
Total 
665 
FEET 
50 
30 
135 
15 
Io 
32 
150 
879 
